from flask import current_app, jsonify
from flask import render_template
from flask import request
from flask import session
# from sqlalchemy.sql.functions import user

from info import constants
from info.models import News, User, Category
from info.utils.response_code import RET
from . import index_blu
from info import redis_store



@index_blu.route('/news_list')
def news_list():
    """获取首页新闻数据"""
    # 1. 获取参数
    #　新闻的分类id
    cid = request.args.get("cid","1")
    page = request.args.get("page","1")
    per_page = request.args.get("per_page","10")

    #2. 检验参数
    try:
        cid = int(cid)
        page = int(page)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    filters = [ ]
    if cid != 1:  # 查询的不是最新的数据

        # 需要添加条件
        filters.append(News.category_id == cid)

    #3. 查询数据
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page, per_page, False)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询cuowu")

 
    # 取到当前页的数据
    news_model_list = paginate.items
    total_page = paginate.pages
    current_page = paginate.page

    # 　将模型对象列表转成字典列表
    news_dict_li = [ ]

    for news in news_model_list:
        news_dict_li.append(news.to_basic_dict())

    data = {
        "total_page":total_page,
        "news_dict_li":news_dict_li,
        "current_page":current_page
    }
    return jsonify(errno=RET.OK ,errmsg="OK",data = data )


@index_blu.route('/')
def index():
    """
    显示首页
    １．　如果用户已经登陆，将当前登陆用户的数据传到魔板中，供模版显示

    :return:
    """
    # 获取到当前登录用户的id
    user_id = session.get("user_id",None)
    # 通过id获取用户信息
    user = None
    if user_id:
        try:
            user = User.query.get(user_id)
        except Exception as e:
            current_app.logger.error(e)


    # 右侧的新闻排行的逻辑
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    # 　定义一个空的字典列表　　里面装的是字典
    news_dict_li = []
    #　便利对象列表，将对象的字典添加到字典列表中
    for news in news_list if news_list else []:
        news_dict_li.append(news.to_basic_dict())

    #　查询分类数据　，通过模版的形式渲染出来
    categories = Category.query.all()

    category_li = [ ]
    for category in categories :
        category_li.append(category.to_dict() )

    data = {
        "user":user.to_dict() if user else None,
        "news_dict_li": news_dict_li,
        "category_li": category_li,

    }
    return render_template('news/index.html',data = data )







    #
    # user = User()
    #
    # data = {
    #     "user_info": user.to_dict() if user else None,
    #
    #
    # }
    # return render_template('news/index.html',data = data )

# 打开网页的术后，浏览器会默认去请求跟路径的　小图标
# send_static_file 是 flask 去查找指定的静态文件所调用的方法
@index_blu.route('/favicon.ico')
def favicon():
    return current_app.send_static_file('news/favicon.ico')
